Query: iam_roles_for_rds_db_cluster

select
  roles ->> 'RoleArn' as role_arn
from
  aws_rds_db_cluster
  cross join jsonb_array_elements(associated_roles) as roles
where
  arn = $1
  and account_id = split_part($1, ':', 5)
  and region = split_part($1, ':', 4);